| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 16 | |
| #2 | Switzerland | 3 | |
| #3 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Optics | |
| #2 | Mechanical elements | |
| #3 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Cameras | |
| #2 | Frames | |
| #3 | Unspecified technologies | |
| #4 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Karpf Nikolaus | 15 |
| #2 | Linhof K G Valentin | 3 |
| #3 | Nikolaus Karpf | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2913970A | Camera with exchangeable back | |
| DE958980C | Optical viewfinder | |
| DE944047C | cassette | |
| DE912172C | Drain brake for focal plane shutters of photographic cameras | |
| DE969225C | Drive lock for the roll film transport in photographic cameras |